CEILING / SURFACE SPEAKER Built-in cardioid condenser ceiling microphone with built-in pre-amplifier with high sensitivity. Designed to capture remotely, they make it perfect for videoconferencing applications, online courses, hospital rooms, surveillance and ambient sound. The microphone can be angled up to 45º towards the source within its package. Immune to RF from GSM or mobile devices. Frequency response: 60Hz-10kHz. Impedance: 150 Ohms. SNR (pond. A): 72dB. SPL Max: 130dB. Sensitivity: 38mV / Pa. Phantom 18-52V. White color. Dimensions seen: 65mm diameter x 10mm (Pr). Weight: 0.94Kg.